SliderToolTip Class Reference

private class used by the DynamicSlider to show tooltips. do not use! More...

#include <dynamicSlider.h>

Inheritance diagram for SliderToolTip:

Collaboration diagram for SliderToolTip:

List of all members.

Public Member Functions
	SliderToolTip (QWidget *parent, DynamicSlider *slider)
Private Slots
void	showTooltip ()
void	update ()
void	hideTooltip ()
Private Attributes
DynamicSlider *	slider

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Detailed Description

private class used by the DynamicSlider to show tooltips. do not use!

Definition at line 71 of file dynamicSlider.h.

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Constructor & Destructor Documentation

SliderToolTip::SliderToolTip	(	QWidget *	parent,
		DynamicSlider *	slider
	)

Definition at line 121 of file dynamicSlider.cpp.

References hideTooltip(), showTooltip(), slider, and update().

: QLabel( parent, "toolTipTip",
          WStyle_StaysOnTop | WStyle_Customize | 
          WStyle_NoBorder | WStyle_Tool | WX11BypassWM )
{
  //store slider handle                             
  this->slider = slider;
  
  //setup lable to use standard black writing on a light yellow background so it
  //looks like a normal tooltip
  setPaletteForegroundColor( QColor("Black") );
  setPaletteBackgroundColor( QColor("LightYellow") );

  //use default system tooltip font
  setFont( QToolTip::font() );
  
  //setup the otherparmslike a frame etc so it looks like a normal tooltip
  setMargin(1);
  setAutoMask( FALSE );
  setFrameStyle( QFrame::Plain | QFrame::Box );
  setLineWidth( 1 );
  setAlignment( AlignAuto | AlignTop );
  setIndent(0);
  polish();
  adjustSize();
  
  //show the tooltip when the user presses the slider
  connect( slider, SIGNAL( sliderPressed() ),  this, SLOT( showTooltip() ) );
  
  //move tooltip to follow the slider handle
  setMouseTracking(true);
  connect( slider, SIGNAL( mouseHasMoved() ),  this, SLOT( update() ) );
  
  //hide tooltip when users releases the slider
  connect( slider, SIGNAL( sliderReleased() ), this, SLOT( hideTooltip() ) );
}

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Member Function Documentation

void SliderToolTip::hideTooltip

(

)

[private, slot]

Definition at line 165 of file dynamicSlider.cpp.

Referenced by SliderToolTip().

{ hide(); }

void SliderToolTip::showTooltip

(

)

[private, slot]

Definition at line 158 of file dynamicSlider.cpp.

References update().

Referenced by SliderToolTip().

{
  //make sure label is up-to-date
  update();
  show();
}

void SliderToolTip::update

(

)

[private, slot]

Definition at line 167 of file dynamicSlider.cpp.

References DynamicSlider::getMousePos(), height, slider, and width.

Referenced by showTooltip(), and SliderToolTip().

{
  //margin well provide betweent the slider and the tooltip
  const int TOOLTIP_MARGIN = 4;
  
  //fetch slider handle rect
  QRect sliderRect = slider->sliderRect();
  
  //determine location tooltip will be shown
  QPoint tooltipTopLeft;
  if( slider->orientation() == Qt::Horizontal )
  {
    tooltipTopLeft = QPoint( sliderRect.right() + TOOLTIP_MARGIN,
                             slider->getMousePos().y() >= sliderRect.top() ?
                             sliderRect.top() - TOOLTIP_MARGIN - height() :
                             sliderRect.bottom() + TOOLTIP_MARGIN );
  }
  else
  {
    tooltipTopLeft = QPoint( slider->getMousePos().x() >= sliderRect.right() ?
                             sliderRect.left() - TOOLTIP_MARGIN - width() :
                             sliderRect.right() + TOOLTIP_MARGIN,
                             (sliderRect.top() + sliderRect.bottom())/2 - height()/2 );
  }
  
  //map tooltip position from slider widget to screen coordinates
  tooltipTopLeft = slider->mapToGlobal( tooltipTopLeft );
  
  //position tooltip
  move( tooltipTopLeft );
  if( isShown() ) qApp->processEvents();
}

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Member Data Documentation

DynamicSlider* SliderToolTip::slider [private]

Definition at line 79 of file dynamicSlider.h.

Referenced by SliderToolTip(), and update().

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The documentation for this class was generated from the following files:

• dynamicSlider.h
• dynamicSlider.cpp